code: def test_merge_from_proto_and_to_proto_with_all_fields(self):
      want_proto = text_format.Parse(
          _FULL_PROTO, model_card_pb2.ModelCard()
      )
      model_card_py = model_card.ModelCard()
      model_card_py.merge_from_proto(want_proto)
      got_proto = model_card_py.to_proto()
  
      self.assertEqual(want_proto, got_proto)
  
imports: import json
  import os
  import pkgutil
  import jsonschema
  from absl.testing import absltest
  from google.protobuf import text_format
  from model_card_toolkit import model_card
  from model_card_toolkit.proto import model_card_pb2
label_desc: Use image node_id 2 for calling the ModelCardTest obj's underlying member method code with example usage: obj.test_merge_from_proto_and_to_proto_with_all_fields() without return types